[Bug libstdc++/116513] mishandles m68k extended real

[schwab--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116513

--- Comment #1 from Andreas Schwab <sch...@linux-m68k.org> ---
std::strong_order (1.0L, 2.0L) returns equal instead of less.